AirHint found the following cheapest return flights from Grand Rapids (GRR) to San Juan (SJU) in December 2025 (see full year).
Return flights
| 06 Dec - 14 Dec | Frontier Airlines | ||
| 13 Dec - 21 Dec | Frontier Airlines | ||
| 15 Dec - 19 Dec | Allegiant Air | ||
| 14 Dec - 21 Dec | Frontier Airlines | ||
| 31 Dec - 06 Jan | Allegiant Air | ||
| 24 Dec - 03 Jan | Allegiant Air |
Also check the deals for one-way flights from Grand Rapids to San Juan in December.
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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.
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